Dieter Schmid's Fine Tools
Japanese water stones: Sigma Select II

Japanese water stones: Sigma Select II

The sharpening stone manufacturer Sigma Power Corporation in Tokyo has developed these premium stones especially for tough-to-sharpen high-alloy steels, like high-speed steel.

It is clear that the manufacturer has made great efforts to ensure that these stones produce a grinding experience similar to that of natural stones. In contrast to resin-magnesium- or cement-bonded stones, there are no bonding materials in Select II stones. The grit is bonded by a process similar to that used for making glass. As the stone cools, the viscosity increases. This inhibits crystallization and the material assumes an amorphous state. This process is expensive, but results in a stone that carves its way through even the toughest steels.
Of course, the steel is not the only thing that gets ground away quickly. The sharpening process produces a thick slurry, causing the stone to dish more than others – the price you pay for speed! Unsurprisingly, Select II stones must be flattened more frequently. On the bright side, flattening these stones is relatively unproblematic!

Sigma 240 roughing stone

Select II series
240 grit grade whetstone for

  • coarse work on very dull edges
  • for basic sharpening
  • changing bevel angles
Size 205 mm x 78 mm x 25 mm

Code 312575CartPrice € 45.00
Sigma 400 roughing stone

Select II series
400 grit grade whetstone for

  • coarse work on very dull edges
  • for basic sharpening
Size 210 mm x 75 mm x 25 mm

Code 312585CartPrice € 55.00
Sigma 1000 sharpening stone

Select II series
1000 grit grade whetstone for

  • effective sharpening
Size 202 mm x 77 mm x 30 mm

Code 312576CartPrice € 57.00
Sigma 3000 honing stone

Select II series
3000 grit grade whetstone for

  • honing away scratches
  • removing burrs after sharpening
Size 210 mm x 75 mm x 25 mm

Code 312577CartPrice € 59.00
Sigma 6000 honing stone

Select II series
6000 grit grade whetstone for

  • honing away scratches
  • removing burrs after sharpening
Size 210 mm x 75 mm x 25 mm

The finished edge is clearly finer than one obtained with the 3000 grit stone.

Code 312578CartPrice € 79.00
Sigma 10000 honing stone

Select II series
10000 grit grade whetstone for

  • very fine honing
  • removing burrs after sharpening
  • obtaining a mirror finish
  • the consummate kick for the perfectionist
Size 210 mm x 75 mm x 25 mm

Code 312580CartPrice € 89.00
SIGMA 13000 honing stone Super Fine Honing Stone

Select II series
13000 grit grade whetstone for

  • super-fine honing
  • removing burrs after sharpening
  • obtaining a perfect mirror finish
  • the ultimate kick for the perfectionist
Size 210 mm x 75 mm x 25 mm

Code 312582CartPrice € 99.00
You are here:   Homepage   →   Sharpening Tools, Waterstones   →   Japanese water stones: Sigma Select II